A purpose-built 5-gallon supply reservoir that pairs directly with Flow-Rite mini battery watering pumps. Fill it once, pump multiple batteries without lifting a water jug, and keep your deep-cycle bank topped off safely and consistently.
Overwatering and underwatering are the two fastest ways to shorten the life of your RV house batteries, golf cart batteries, or any deep-cycle flooded lead-acid bank. The Flow-Rite BA-554 is the dedicated supply tank for Flow-Rite's mini pump battery watering systems -- giving you a controlled, repeatable fill process every time.
The 5-gallon capacity is enough to water most small-to-medium battery banks in one session without refilling the tank mid-job. Pair it with a Flow-Rite mini pump and battery watering rings and you have a closed-loop system that fills each cell to exactly the right level automatically.
Enough distilled water supply to service most small-to-medium RV or golf cart battery banks in a single session.
Designed to connect directly to Flow-Rite mini pump battery watering systems -- no adapters needed within the Flow-Rite ecosystem.
Works with Flow-Rite watering rings to deliver precise, repeatable fill levels without cell-by-cell guesswork or overflow risk.
Compact tank body is easy to carry to your battery compartment, bay, or storage area -- no plumbing required for basic setups.
Flooded lead-acid batteries -- the kind used in most RV house banks, golf carts, and solar storage setups -- require periodic addition of distilled water to replace electrolyte lost during charge cycles. A Flow-Rite battery watering system replaces the individual cell-by-cell process with a manifold and pump system that fills all cells simultaneously to an exact, float-controlled level.
The BA-554 tank is the supply side of that system. You fill the tank with distilled water, connect the mini pump, and the pump delivers water through the battery watering rings until each cell reaches its proper fill level -- then stops automatically.
Always fill this tank with distilled or deionized water only. Tap water, filtered water, and softened water all contain minerals that accelerate plate sulfation and void most battery warranties. Distilled water is widely available at grocery and hardware stores in gallon jugs.
The BA-554 tank is part of the Flow-Rite battery watering product family. It is designed to work with Flow-Rite mini pump assemblies that attach directly to the tank outlet. The complete system typically includes:
Check the Flow-Rite product family to match the correct pump model and watering ring type for your specific battery make and case size before ordering.
Flow-Rite watering systems are designed for flooded lead-acid (wet cell) batteries only. Do not use on sealed AGM, gel cell, or lithium batteries -- those chemistries are maintenance-free and do not accept added water. Common RV applications include 6V golf cart-style batteries in series pairs and 12V deep-cycle house batteries.
Full-timers and extended boondockers running large flooded battery banks benefit most from a pump watering system. Checking and topping individual cells in a multi-battery bank under a dinette or in a tight compartment is tedious and prone to spills. The BA-554 tank and pump system lets you connect once, pump once, and walk away knowing every cell is filled correctly.
Golf cart owners, marine battery users, and off-grid solar installers will also find this a practical upgrade over individual cell watering with a squeeze bottle or funnel.
For best results, purchase the complete Flow-Rite mini pump battery watering kit that includes the pump, tubing, and watering rings sized for your specific battery case. The BA-554 tank is a replacement or add-on reservoir for existing Flow-Rite pump system owners, or the tank component when building out a system piece by piece.
This listing is for the BA-554 reservoir tank only. The mini pump, battery watering rings, fittings, and tubing are not included. Confirm compatibility of the pump and ring system with your battery model before completing your system build.